In what way?
Win7 took over a half hour to boot up and become usable. Win10 just a few minutes if that.
Main problems with Win 8.1 were related to Adobe Flash I think - websites like dailycaller.com or freebeacon.com taking 5-10 minutes to load. Ridiculous.
I did get rid of IE11 and went with Firefox+AdBlockPlus. That may have been the biggest benefit when I upgraded.
But, anyway, I upgraded 2 desktops and 1 laptop to Win10 without any problems and am very happy with it.
Also, just as an aside, I had an Office Pro 2013 license, but decided to subscribe to Office365 because my wife has a client that uses it. Very happy with that product/service also.